Explain one thing you learned recently to someone who knows nothing about it.
Imagine telling a younger kid something you just found out. Write it.
Everyone gets the same subject. What differs is the follow-up: one question for children, two for teens, three for adults. Only the children's wording is simplified.
Find the sentence you are least sure about. What you actually meant is usually hiding there.
Skip it and start at the second. The opening writes itself once the rest exists.
Delete every line anyone could have written. What is left is yours.
'Thing' hides the real word. Name it.
'Three years' always beats 'a long time'.
Lose them in line one and the rest never happens.